Warp stop-motion for looms.



E. 1). oseoon & A.- E. RH'DADB'S.

WARP STOP MOTION FOR LOOMS. APPLICATION rum) no. 20, 1910.

Patented Dec. 12, 1911.

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akqqz TENT (if EDWARD DANA OSGOOD AND ELONZO E. EHOADEfi OF HOPEDALE,MASSACHUSETTS, ASSIGINOBS TO DIELAPEPJ CQMPANY, 0F HOPEDALE,MASSACHUSETTS, A CDLEEOM.

T1011 OF MAINE.

WA RP STOP-MOTION FOR LGOMS.

tonne Specification of Letters Patent.

Patented 113cc. 2'12, ihflilfl To all whom it may concern:

Be it known that we, EDWARD DANA Osoooo and Ammo E. RI'IOADES, bothcitizens of the United States, and residents of Hopedale, county ofWorcester, State of Massachusetts, have invented an Improvement in WarpStop-Motion for Looms, of which the following description, in connectionwith the accompanying drawing, is a specification, like characters onthe drawing representing like parts.

This invention relates more particularly to loom stop-motions of thetype wherein an electrical circuit is rendered operative to effect theactuation of the stop-motion by or through failure of one or morewarpth-reads. In one form of such apparatus the metallic detectors ordrop-bars are arranged in a plurality of banks, each detector beingsuspended from a single warp-thread and capable of free movement of thewarpthreads, said warp-threads being so disposed that each thread isnormally out of contact with the detectors suspended from two adjacentthreads, thereby avoiding chafing of the threads. -This brings thedetectors wholly below the sheet of warp, and when a .particulardetector descends or drops into electrical contactwith one terminal ofthe controlling circuit, the latter is closed and rendered operative,the detectors themselves at all times being in electrical contact withthe other terminal of such circuit. A warp stop-motion of this typeforms the subjectmatter of Beissued United States Patent No. 11,923granted July 30, 1901 to Coldwell and Gildard. When the loom is stoppedby the stop-motion therein disclosed the weaver must discover thelocation of the faulty warp-thread, and this is done by causing the loomto run while the weaver watches for the spark between the droppeddetector and the circuit terminal onto or against which it has dropped.The presence of the spark thus marks the location of the droppeddetector, the vibration or jarring .of the loom when running causingsuch de tector to jump or chatter toward and from the lower terminal andthereby c ause the sparking.

It will be understood that after the stop running, so long as the warpfault is uncorrected, unless the shipper is retained in running positionagainst the releasing tendency of the. stop-motion, and there are twomethods in use for keeping the shipper in running position. By the onemethod one operative holds the shipper in running position while theweaver goes to-the side of the loom and looks under the sheet of warpfor the tell-tale sparking which locates the dropped detector and thefaulty warpthread', two persons being required to manipulate the loom.By the other method the weaver jams something against the shipper tohold it in running position while he looks for the spark, and usually abobbin is either forced into the slot of the notched holding plate toretain the shipper in desired position, or the bobbin is insertedbetween'the shipper and the stopping end of the slot. This tends tobreak or split bobbins and is in every way objectionable, and the othermethod is objectionable because itrequires the cooperation of twopersons whenever loom stoppage is due to a warp fault.

Our present invention has for its object the production of simple andellicient means for preventing automatic movement of the shipper tostopping position whenever necessary, and as our invention isparticularly useful in connection with a warp stop-motion of the classdisclosed in the patent referred to we have shown our invention asapplied to a loom provided with such a stopmotion. It will beunderstood, however, that our invention is not necessarilyrestricb ed tothat particular form of stop-motion, as it can be used with other formswherein the ship-per can be retained in running position without injuryto a continued or recurrent operation of the stop-motion.

The novel features of our invention will be fully described it thesubjoined sp cification and particularly pointed out in the followingclaims. 3

Figure 1 is a left-hand side elevation of a portion of a loom providedwith an electromechanical warp stop-motion of the class referred to, andwith one embodiment of our present invention applied thereto; Fig. 2 isan enlarged. transverse sectional view through the lease rods andadjacent parts, showing the detectors or drop-bars and the circuitterminals with which such detectors pooperate when a warp fault occurs;Fig. 3 IS a rear elevation of the notched holding plate for the shipper,and the novel means for. rendering inoperative the releasing means wi hrespect to the shipper, the various parts being shown in normalposition;

Fig. 4 is a top plan view of the parts illustrated in Fig. 8.

Referring to Fig. 1 the upright brackets 2, 2.1nounted opposite eachother on the loom-sides, each having at its inner side a bearing-bracket7 provided in practice with a-suitable bearing of insulating material tosustain one end of a copper or other metallic electrically connectedwith an insulated wire 52 forming part of an electric circuit andleading to one pole of the battery 50 or other source of' electricalenergy; an insulated wire 51 leading from the other pole to the coils ofan electro-magnet 3 4 inclosed in a box or case 33; the pivotedarmature-lever 36 and its referred to and operate armature 37, and thecontact-spring 40 insulated from the loom-side and connected byinsulated wire 42 with the magnet, said spring 40 being arranged contactwith the metallic shipper 28 when the latter is in running position, maybe and are all substantially as in the patent as therein set forth.

Above the contact roller 10, which forms one terminal of the controllingcircuit, the brackets 2 support two horizontally disposed, flat metalrods 19, spaced a suitable distance apart and inclined toward each otherat their upper edges, said rods constituting the other terminal of thecontrolling circuit from spring 40, shipper QSand the loom-frame, aswill be apparent. Lease rods 24 are supported by the brackets 2 abovethe terminal rods 19, see Fig. 2, and over and under the lease rods thewarpthreads are alternately passed in usual manner, as in said patent.The sheet-metal drop-bars or detectors 25 are longitudinally slotted toeasily fit over and slide longitudinally-upon the terminal rods 19, andeach one terminates at its upper end in an eye 26 to loosely straddlethe warp-tl-n'ead, as in the aforesaid patent, and normally the controlling circuit is held open by the intact warp-threads maintaining thedetectors 1 lifted and out of engagement with the terminallO. lVhen awarp-thread fails its detector drops onto said terminal 10, and

' --the."el'ctrical circuit is completed, the magnet 341being energizedand thereby its armature 37 is attracted, while the free end of thelever 36 is raised, it being understoeo that the 100111 frame forms apart of such circuit. The knock-off lever 14, fulcrumed at 43 below thenotched holding plate 29 for the shipper 28, has pivotally connectedwith it at 45 a rearwardly-extended gravity-latch to be in electrical4E6, notched or shouldered'at 47 and connected by a light rod or link 49with thearmature-lever 36, as in the Coldwell and Gildard patent, and astherein described, when the magnet is, energized and its armature isattracted the latch 4-6 is positioned to be struck by the lay on itsforward stroke, whereby the knock-off lever 44: releases the shipperfrom its holding notch in thev plate 29.

\Vhen the loom has been stopped by re'ason'of a warp-fault the positionof the dropped detector is indicated by sparking between itand theterminal 10 when the loom is caused to run by maintaining the shipper inrunning position. We will now describe the means whereby we preventship.- per'release when the loom is started forthe purpose of findingthe faulty warp-thread. At'the rear side of the plate 29 above the latchl6 we fulcrum at a 2. depending detent b, the head I) of which isextended across the holding plate, Figs. 1 and 4, far enough to benormally engaged, when the shipper is in running position, by a dog 0pivoted at 0' on the shipper, said dog having a finger piece 0 on itsouter end, a stop 0* on the shipper preventing the heavier inner end ofthe dog from swinging down below the head Z) of the detent. Normally theweight of the inner end of the dog keeps it in the position shown, Fig.3,;when the shipper is in running position, so that the dog then engagesthe head Z) and swings the detent b outward carrying its lower end toone side of the latch 46, and no obstacle is presented to the upwardmovement of the latch into operative position to be engaged and pushedforward by the lay to effect shipper release. Ordinarily the weaver paysno attention to the detent or its controlling dog 0, butafter stoppageof the loom by a warp fault, when it is desired to run the loom andlocate the dropped detector, the weaver moves the shipper to runningposition and at the same time depresses the finger-piece 0 therebylifting the inner end of the dog c'so that when the shipper enters itsholding notch said dog passes above and drops onto the head 6 and thedetent Z) remains in the position assumed when the shipper wasautomatically released, the lower end of the de tent being above and inthe path of the latch 46. The loom is of course started up by themovement of the shipper to running position, and as the warp fault hasnot been corrected the controlling circuit is closed by engagement ofthe shipper with the spring contact 40 and also by engagement of thetively positioned above said latch the latter cannot rise and hence itcannot be engaged by the lay on its forward beat. As a result theshipper remains in its holding notch, and the loom continues to run,giving the Weaver a chance to move about the loom to a point where hecan see the sparking betweenthe dropped detector and the terminal 10,and thereby locate the dropped detector. When the dropped detector islocated the faulty warp is properly manipulated to correct the fault,and the loom is stopped by throwing the shipper manually out of itsholding notch. Thereupon the dog a resumes its normal position on theshipper and when the latter is again moved to runningposition said dogengages the head Z) of the detent and moves the latter to the positionshown, at one sideof the path of the latch- 46. Should, the detent beoperatively positioned while the shipper isin running position, as hasbeen described, the weaver can by hand move'the head I) inward frombeneath the dog, the latter then dropping into the-position shown inFig. 3 to engage said head and hold the detent in inoperative position.By means of our invention the weaver can manage the loom withoutassistance when a warp faultoccurs, and the use of a bobbin or someother device to prevent movement of the shipper to stopping posi- 'tionis wholly eliminated.

. by Letters Patent is:

Changes or modifications in, different details of construction andarrangement may be made by those skilled inv the art without departingfrom the spirit and scope of our invention as set forth in the claimshereto annexed.

Having fully described our invention, what we claim as new and desire tosecure 1. In a loom, a shipper, and releasing mechanism thereforincluding a latch and electro-mechanical means to operatively positionit by or through the occurrence of a warp fault, combined with a deviceadapted to prevent operative positioning of the latch, and a controllingmember for said device, mounted on the shipper and normally maintainingthe said device inactive with respect to the latch when the shipper isin running position, abnormal positioning of the controlling member whenthe shipper is moved to running position permitting said device tocooperate with the latch and prevent movement thereof to operativeposition.

2. In a loom, a shipper, and releasing Inechanism therefor including alatch and electro-mechanical means to operatively position it by orthrough the occurrence of a warp' fault, combined with means forming apart of the loom instrumentality and which normally permits theoperative positioning of said latch when theshipper is in runningposition, said means including. a

member manually movable into position to render'the means active toprevent such op erative positioning of the latch, whereby the loom canbe run when desired during the continuance of the warp fault.

3. In a loom, a shipper, andreleasing mechanism therefor including alatch and electro-mechanical means to operatively position it by orthrough the occurrence of a warp fault, combined with separate means toprevent operative positioning of said latch and normally renderedinactive by movement of the shipper to running posi tion, said meansincluding a member manually positioned to render the means active toprevent operative positioning of the latch.

4. In a, loom, a shipper, and releasing means therefor including alatch, combined with automatic means adapted to operatively position thelatch byor throughgthe occurrence of a warp fault, and separate meanscomprising two members normally adapted to cooperate and thereby permitoperative positioning of the latch by said automatic means when theshipper is in running position, manual movement of said members out ofcooperation acting to prevent operative positioning of the latch.

5. In a loom, a shipper, and releasing mechanism therefor actuated by orthrough the occurrence of a warp fault, combined with governing means.for the releasing mechanism comprising a controlling member movablewith and also relatively to the shipper and a separately mounted-detentnormally maintained inoperative by said controlling member when theshipper is in running position, said means serving to prevent theactuation of the releasing mechanism when the shipper is in runningposition and said controlling member is moved manually into abnormalposition.

6. In a 100110; a shipper, and'an electromechanical stop-motion adaptedto effect shipper release by or through failure of a warp thread,combined with means, comprising a plurality of members, to at willrender said stop-motion inoperative to efi'ect shipper releasewhen theshipper is in running position, movement of the shipper to such positionnormally acting to effect coopera tion of said members and therebyrender said means inactive with respect to the stopmotion.

7. In a loom, a shipper, a series of stopmotion controlling detectorssuspended from prising a detent member, and a controlling member on theshipper, to prevent at will the normal operation of said shipperreleasing means when the shipper is in running position and a detectoris positioned abnormally, whereby the loom can be run while suchdetector is located by the weaver.

8. In a loom, a shipper, and releasing mechanisi 1 therefor including alatch and means to operatively position the same upon the occurrence ofa warp fault, combined with a detent movable into cooperation with andto prevent operative positioning of said latch, and a controlling dogcarried by and movable relatively to the shipper and normally acting torender the detent inoperative when the shipper is in running position,manual movement of said dog to clear the detent when said shipper ismoved to running position permitting the detent to remain operative withrespect to the latch.

9. In a loom, in combination, a shipper, an electro-mechanical warpstop-motion including a series of controlling detectors and adapted toeffect shipper release upon dropping of a detector due to a warp fault,and means to at times prevent shipper release by the stop-motion, whenthe latter is set in action by a dropped detector, whereby such droppeddetector causes the formation of a series of electric sparks, said meanscomprising a plurality of normally cooperating members, manual movementof one of such members to abnormal position rendering the said meansactive to prevent shipper release.

In testimony whereof, we have signed our names to this specification, inthe presence of two subscribing witnesses.

EDbVARD DANA OSGOOD. ALONZO E. RHOADES.

Witnesses:

HARRY F. PIERCE, F. H. FRENCH.

